遗传神经网络能耗预测模型在钢铁企业中的应用

为改善BP网络训练速度慢,易收敛于局部极小点及全局搜索能力弱等固有缺陷,采用遗传算法优化神经网络的初始权值和阈值,以通化钢铁公司炼铁厂为研究对象,建立了基于遗传算法的人工神经网络能耗预测模型。用MATLAB编写计算程序进行测试,并与纯BP算法进行分析比较,结果表明,文中所提出的方法在预测精度和收敛速度方面均得到了改进。     

软交换中的网络安全问题

随着向下一代网络的演进,电信网络会逐渐过渡到基于IP的分组核心网络。传统的电信网络由于它的相对独立,具有较高的安全性。作为下一代网络中的核心技术——软交换,由于其支撑业务的多样性以及开放的网络架构,将会面临更复杂的安全环境。本文提出了一种软交换中的网络安全解决方案。结合具体的实现,给出了软交换环境中网络安全相关部分的设计。     

A novel architecture for cargos location and safety in networked RFID

Using Networked RFID equipped in warehouse or supermarket distribution, Enterprise information system (EIS) can gather and deal with cargos information. Nevertheless, when cargos are in traffic, the Networked RFID can't monitor the cargos any more as the products tagged aren't within range of a reader. This paper proposes a solution framework which combines Networked RFID and GPS tracking, and then equip with this system in container to make the cargos monitored even if the cargos are in traffic. This solution can solve the accurate consignments, position tracking and advanced theft happening through drilling holes in container. In addition, customhouse and checkpoint can get an electronic shipment manifest rapidly and safely when a vehicle gets through a checkpoint.     

蜜网系统中蜜墙的研究与设计

蜜网是一种高交互的蜜罐,是一个具有高度可控性的网络系统。蜜网的核心需求就是数据控制和数据捕获,而其关键部件就是蜜墙。本文将结合蜜网的核心需求尝试对蜜墙进行研究与设计。     

病毒微生物农药生产新工艺

本文综述了病毒微生物农药生产的新工艺,即应用昆虫培养细胞产生病毒微生物农药。同时还介绍了昆虫细胞培养基、培养方法和核多角体病毒生产的工艺过程。也指出应用昆虫培养细胞生产病毒存在的问题。     

网络环境下的设备管理系统

介绍了在DEC net网络环境下实现设备管理系统的总体设计思想和关键技术.该系统具有使用方便、通用性强的特点.同时,该系统的实现,为在网络环境下实现其它信息管理提供了可行的途径.     

习惯路径算法与EMME/2的连接

本文提出了一种有效的交通流量的经验分配方法——习惯路径算法。该算法可以考虑规划的情况,并且可以同EMME/2进行数据通讯。     

网络化趋势及图书馆员的继续教育

该文着重论述网络化趋势中的高校图书馆只有配备高素质的专业馆员,才能使其全部作用发挥出来,因此,加强高校图书馆员的继续教育显得尤为重要。     

Distribution of HIV-1 in the genomes of AIDS patients

The localization of HIV-1 proviruses in compositional DNA fractions from 27 AIDS patients during the chronic phase of the disease with depletion of CD4+ and different levels of viremia showed the following. (1) At low viremia, proviruses are predominantly localized in the GC-richest isochores, which are characterized by an open chromatin structure; this result mimics findings on HIV-1 integration in early infected cells in culture. (2) At higher viremia, an increased distribution of proviruses in GC-poor isochores (which match the GC poorness of HIV-1) was found; this suggests a selection of cells in which the isopycnic localization leads to a higher expression of proviruses and, in turn, to higher viremia. (3) At the highest viremia, integrations in GC-rich isochores are often predominant again, but generally not at the same level as in (1); this may be the consequence of new integrations from the extremely abundant RNA copies.Received 21 November 2003; received after revision 13 January 2004: accepted 15 January 2004     

下一代通信网络技术的演进和发展

研究了建立在不同的传输技术基础上通信网络的特点,分析了通信网络的发展历程以及下一代通信网络的发展趋势和结构特点。